Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

6.5 wont take fuel when cold

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  #21  
Old 04-20-2016, 08:42 PM
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Nope just ordered one today with a relocation kit. I found a nice trick today though. Wrap your minds around this. I can start the truck and it will idle and not rev as usual. I can go out and give it a shot of starting fluid and make it rev up then it will take right off and start revving with the throttle. I done this 3 times so it's not coincidence.
 
  #22  
Old 04-21-2016, 08:24 AM
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tricks aside it seems like an electrical issue to me and here is a prayer for the pmd fixing it. if it doesnt its injection pump time.
 
  #23  
Old 04-23-2016, 07:22 AM
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Try swapping out the electronic throttle control thingy.
 
  #24  
Old 04-23-2016, 03:50 PM
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I replaced the accelerator pedal already if that's what your talking about.
 
  #25  
Old 04-24-2016, 07:23 AM
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swaptronix is the worst.
 
  #26  
Old 04-24-2016, 11:34 PM
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Pmd didn't help it. I'm so aggravated with this thing. I've spent a fortune in new parts and can't get any help. I've called stanadyne for support about 10 times and they won't even return my calls. It has something to do with the idle because I can give it a shot of juice a it'll take right off running great and idle where it's suppose to. Before the juice it'll start and idle but very low. The only thing I haven't changed is the pump itself but I just can't conclude how the pump would be bad since it'll run all day long great after I get it to take the throttle. It's like it doesn't even recognize the throttle action when the idle is below a certain rpm.??????
 
  #27  
Old 04-25-2016, 07:02 AM
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I don't understand why you would call standyne? I have also been avoiding it but you cant just keep blindly changing **** and getting upset that its costing you a ton of money. 6.5s are incredibly simple and 2 minutes with a scan tool would have bypassed allot of this. If their are no codes, fuel flows out of the fuel drain, and the pmd is good there is really only 1 option left. If it was me i would try advancing the injection pump, doing an optical bump, running a high quality system cleaner through it to try and salvage the injection pump. But please stop saying it wont take fuel it sounds like you are having trouble putting fuel in the tank.
 
  #28  
Old 04-25-2016, 07:29 AM
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Well let's see, stanadyne manufactures the ds4 injector pump that's on my truck and no one else will explain the technical order of the operation of that pump. And I haven't been blindly replacing parts, I have taken advice from these forums telling me I have a fuel restriction, bad lift pump, ops, or pmd. And I guess instead of won't take fuel I should say when I press the accelerator pedal with my foot the engine rpms won't rise to make the vehicle move in a forward or rearward motion. If a scanner would show an obvious problem I would have had it fixed 3 months ago.
 
  #29  
Old 04-25-2016, 09:34 AM
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standyne didnt sell it to you and they dont have a free tech line. If you had a scan tool you wouldnt have changed the throttle pedal. This forum advice has been to inspect for fuel restriction, lift pump, ops, not change them all. PMD, yea its a little box of 1000 mysteries you cant really check it and it does all kinds of funny stuff when they are bad. OR you could just say the engine wont rev until it warms up a bit and idles low. Like i said, if the pmd is good, no codes, it drives normal after it runs a bit, fuel comes out of the fuel filter when you crack it there isnt much left outside of the main injection pump. It could be wore out and has trouble pumping initially, could be retarded from warn timing chain, could be a ton of things. Just trying to get you on the right path here.
 
  #30  
Old 04-25-2016, 01:51 PM
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Thanks I'll try to bump timing up and see what happens. I'll try anything it's driving me crazy. Do you guys think it's a possibility someone has it addicted to starting fluid? I've always heard that phrase but never knew if it was possible?
 



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